EVOC PCL-726, Manual

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Installation
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13
2.8 Connector Pin Assignment
The PCL-726 comes equipped with one 37-pin D-sub (CN3) and two
20-pin insulation displacement connectors (CN1 and CN2). The P1 is
located at the rear plate; the CN1 and CN2 are located on board.
CN3 is used for analog outputs and reference voltage input, CN2 for
digital inputs, CN1 digital outputs. Each connector's pin assignment is
specified as follows:
Legend :
V.OUT : Analog Voltage Output
I.OUT : Analog Current Output
A.GND : Analog Ground
D/A : Analog Output
D.GND : Digital Ground
REF.OUT : Reference Voltage Output
REF.IN : Reference Voltage Input
EXT TRG : External Interrupt Trigger
DO : Digital Output
DI : Digital Input
NC : No Connection